Fix npm browserify

[jasonLaster]

When I ran npm run browserify I got this error. The fix seemed to be to copy package.json into tmp. Have you seen this before?

➜  espree git:(cleanup-makefile) ✗ npm run browserify

> espree@2.0.4 browserify /Users/jlaster/src/_os/_js/espree
> node Makefile.js browserify

Error: Cannot find module './package.json' from '/Users/jlaster/src/_os/_js/espree/tmp'
    at /Users/jlaster/src/_os/_js/espree/node_modules/browserify/node_modules/browser-resolve/node_modules/resolve/lib/async.js:55:21
    at load (/Users/jlaster/src/_os/_js/espree/node_modules/browserify/node_modules/browser-resolve/node_modules/resolve/lib/async.js:69:43)
    at onex (/Users/jlaster/src/_os/_js/espree/node_modules/browserify/node_modules/browser-resolve/node_modules/resolve/lib/async.js:92:31)
    at /Users/jlaster/src/_os/_js/espree/node_modules/browserify/node_modules/browser-resolve/node_modules/resolve/lib/async.js:22:47

I also included some red npm test code because to the outsider it looks like you commented out your tests, whichi is not the case :)

[xjamundx]

oooh that looks cool. should fix #156 then

[nzakas]

Looks good, can you please update the commit message to be in the form:

Fix: npm browserify (fixes #156)

Also, can you please sign our CLA? http://ESLint.org/cla

[jasonLaster]

Sure.

[jasonLaster]

done